2020+ Ford Super Duty Upfitter Harness Extensions

Upfitter Extensions

Need more reach from your upfitter relay box? Our Upfitter Extensions use the same OEM-style connectors featured in our No-Crimp Solution, giving you clean, reliable plug-and-play access to each upfitter circuit — no cutting, no splicing required.

Each extension includes:
• 18 inches of wire with 12 inches of protective nylon sleeving
• Matching male and female connectors
• Heat-shrink solder connectors for secure, weather-resistant splices

Now available in 6-wire, 7-wire, and our new 10-wire option, which includes:
• All standard upfitter circuits
• Both PTO (Power Take-Off) wires
• An always-hot 20 amp circuit for accessory power

For a clean and complete install, pair with our Grounding Solution.

Compatible with 2020–present Super Duty trucks.
Proudly made in the USA.